World Library  


Add to Book Shelf
Flag as Inappropriate
Email this Book

On Determining the Noon Polar Cap Boundary from Superdarn Hf Radar Backscatter Characteristics : Volume 18, Issue 12 (30/11/-0001)

By Pinnock, M.

Click here to view

Book Id: WPLBN0004000677
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: On Determining the Noon Polar Cap Boundary from Superdarn Hf Radar Backscatter Characteristics : Volume 18, Issue 12 (30/11/-0001)  
Author: Pinnock, M.
Volume: Vol. 18, Issue 12
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

APA MLA Chicago

Pinnock, M., & Rodger, A. S. (-0001). On Determining the Noon Polar Cap Boundary from Superdarn Hf Radar Backscatter Characteristics : Volume 18, Issue 12 (30/11/-0001). Retrieved from http://members.worldlibrary.net/


Description
Description: British Antarctic Survey, Madingley Road, Cambridge CB3 0ET, UK. Previous work has shown that ionospheric HF radar backscatter in the noon sector can be used to locate the footprint of the magnetospheric cusp particle precipitation. This has enabled the radar data to be used as a proxy for the location of the polar cap boundary, and hence measure the flow of plasma across it to derive the reconnection electric field in the ionosphere. This work used only single radar data sets with a field of view limited to ~2 h of local time. In this case study using four of the SuperDARN radars, we examine the boundary determined over 6 h of magnetic local time around the noon sector and its relationship to the convection pattern. The variation with longitude of the latitude of the radar scatter with cusp characteristics shows a bay-like feature. It is shown that this feature is shaped by the variation with longitude of the poleward flow component of the ionospheric plasma and may be understood in terms of cusp ion time-of-flight effects. Using this interpretation, we derive the time-of-flight of the cusp ions and find that it is consistent with approximately 1 keV ions injected from a subsolar reconnection site. A method for deriving a more accurate estimate of the location of the open-closed field line boundary from HF radar data is described.

Key words: Ionosphere (ionosphere–magnetosphere interactions; plasma convection) · Magnetospheric physics (magnetopause · cusp · and boundary layers)


Summary
On determining the noon polar cap boundary from SuperDARN HF radar backscatter characteristics

 

Click To View

Additional Books


  • Significance Tests for the Wavelet Cross... (by )
  • Diffusion at the Earth Magnetopause: Enh... (by )
  • Planar Charged-particle Trajectories in ... (by )
  • Quiet-condition Variations in the Scale ... (by )
  • Spectrum Analysis of Short-period K Inde... (by )
  • Polarisation and Propagation of Lion Roa... (by )
  • Imaging and Eiscat Radar Measurements of... (by )
  • Upper-mesospheric Temperatures Measured ... (by )
  • Cluster Observations of the Substructure... (by )
  • Terrestrial Exospheric Hydrogen Density ... (by )
Scroll Left
Scroll Right

 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.